CN115854596A - Heat exchanger - Google Patents
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- CN115854596A CN115854596A CN202211563228.2A CN202211563228A CN115854596A CN 115854596 A CN115854596 A CN 115854596A CN 202211563228 A CN202211563228 A CN 202211563228A CN 115854596 A CN115854596 A CN 115854596A
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Abstract
The application belongs to the technical field of air conditioning, and particularly relates to a heat exchange device. The conventional heat exchanger cannot change the number of flow paths at the time of cooling/heating switching. The application provides a heat exchange device, including a plurality of heat exchange modules, heat exchange module is including the first refrigerant access & exit, knockout, microchannel heat exchanger and the second refrigerant access & exit that communicate in proper order, the second refrigerant access & exit with the knockout is connected, first cavity, first refrigerant runner and second header communicate in proper order, and second cavity, second refrigerant runner and second header communicate in proper order, are provided with a plurality of first heat transfer units in the first refrigerant runner, are provided with a plurality of second heat transfer units in the second refrigerant runner, the knockout respectively with first cavity and second cavity intercommunication, second refrigerant access & exit communicate with second cavity and second header respectively, and heat exchange module can regard as evaporimeter or condenser. The heat exchanger has multiple branches when used as evaporator and less branches when used as condenser.
Description
Technical Field
The application belongs to the technical field of air conditioning, and particularly relates to a heat exchange device.
Background
The heat exchanger is an energy-saving device for transferring heat between materials between two or more fluids with different temperatures, and is used for transferring heat from the fluid with higher temperature to the fluid with lower temperature to make the temperature of the fluid reach the index specified by the process so as to meet the requirements of process conditions, and is also one of main devices for improving the utilization rate of energy. The heat exchanger industry relates to more than 30 industries such as heating ventilation, pressure vessels, reclaimed water treatment equipment, chemical industry, petroleum and the like.
The heat exchanger under the existing refrigeration/heating double-mode air conditioner is respectively used as an evaporator and a condenser under different modes. In general, a supercooling section is additionally provided to improve the heat absorption efficiency of a refrigerant when the heat exchanger is used as a condenser, but the supercooling section may increase the pressure loss of a system flow path and reduce the heat release efficiency of the heat exchanger when the heat exchanger is used as an evaporator. Therefore, for the dual-mode air conditioner, when the heat exchanger is used as an evaporator, the number of parallel flow paths needs to be increased, the length of a pipeline is reduced, the pressure loss is reduced, and the heat exchange efficiency is improved; when the condenser is used, the number of parallel flow paths needs to be reduced, the length of a pipeline is increased, the flow velocity of a refrigerant is improved, and the heat exchange efficiency is improved. The conventional heat exchanger cannot change the number of flow paths at the time of cooling/heating switching.
Disclosure of Invention
1. Technical problem to be solved
Based on the problem that traditional heat exchanger can't change flow path quantity when refrigeration/heating are switched, this application provides a heat transfer device.
2. Technical scheme
In order to achieve the purpose, the application provides a heat exchange device, which comprises a plurality of heat exchange modules, each heat exchange module comprises a first refrigerant inlet and outlet, a liquid distributor, a micro-channel heat exchanger and a second refrigerant inlet and outlet which are sequentially communicated, each second refrigerant inlet and outlet is connected with the liquid distributor, each micro-channel heat exchanger comprises a first collecting pipe, a refrigerant flow passage and a second collecting pipe which are sequentially communicated, each first collecting pipe comprises a first cavity and a second cavity which are connected with each other, each refrigerant flow passage comprises a first refrigerant flow passage and a second refrigerant flow passage, the first cavity, the first refrigerant flow passage and the second collecting pipe are sequentially communicated, the second cavity, the second refrigerant flow passage and the second collecting pipe are sequentially communicated, a plurality of first heat exchange units are arranged in the first refrigerant flow passage, a plurality of second heat exchange units are arranged in the second refrigerant flow passage, the liquid distributor is communicated with the first cavity, the liquid distributor is communicated with the second cavity, the second refrigerant inlet and outlet is communicated with the second collecting pipe, and the heat exchange modules can be used as an evaporator or a condenser.
Another embodiment provided by the present application is: a first check valve is arranged between the liquid separator and the first chamber, a second check valve is arranged between the second refrigerant inlet/outlet and the first chamber, and a third check valve is arranged between the second refrigerant inlet/outlet and the second header.
Another embodiment provided by the present application is: the first chamber is connected with the second chamber through a partition plate, and the first chamber and the second chamber are arranged independently.
Another embodiment provided by the present application is: the first heat exchange unit is a micro-channel flat tube, the second heat exchange unit is a micro-channel flat tube, and the adjacent micro-channel flat tubes are connected through fins.
Another embodiment provided by the present application is: the number of the first heat exchange units is different from that of the second heat exchange units.
Another embodiment provided by the present application is: the liquid distributor comprises a first outlet pipe and a second outlet pipe, and when the heat exchange module is an evaporator, the diameter of the first outlet pipe is different from that of the second outlet pipe.
Another embodiment provided by the present application is: and a plurality of heat exchange modules are stacked in series.
Another embodiment provided by the present application is: a partition plate is arranged between the Nth group of second collecting pipes and the (N-1) th group of second collecting pipes, and a partition plate is arranged between the Nth group of first collecting pipes and the (N + 1) th group of first collecting pipes; the Nth group of the first chambers is communicated with the Nth-1 group of the second chambers; the Nth group of the first one-way valves is connected with the (N-1) th group of the liquid distributors, and the Nth group of the third one-way valves is connected with the (N-1) th group of the third one-way valves.
Another embodiment provided by the present application is: the Nth group of the second chambers is communicated with the (N + 1) th group of the first chambers through a Y-shaped tee.
Another embodiment provided by the present application is: and a plurality of heat exchange modules are stacked in parallel.
3. Advantageous effects
Compared with the prior art, the application provides a heat transfer device's beneficial effect lies in:
according to the heat exchange device provided by the application, when the heat exchange device is used as a condenser, the number of parallel flow paths is reduced, the flow speed is increased, and the heat exchange efficiency is improved; when the heat exchange device is used as an evaporator, the number of parallel flow paths is increased, the pressure loss is reduced, and the heat exchange efficiency is improved.
The application provides a heat transfer device for heat transfer device is many branches when doing the evaporimeter, and few branch road when doing the condenser.
The application provides a heat transfer device uses the check valve to control refrigerant circulation route, can realize the flow conversion under the different operating modes, improves heat exchange efficiency and effectively saves the cost.
The application provides a heat transfer device uses the knockout in different apertures to be connected with each heat transfer flow, can carry out rational distribution to the refrigerant flow under the different heat transfer area.
The application provides a heat exchange device, provides the series connection superposition mode and the parallel connection superposition square test that are applicable to this flow form, and this kind of superposition method can effectively reduce the supporting degree of difficulty of engineering, reduction in production cost, improve equipment reliability.
Drawings
FIG. 1 is a schematic structural view of a heat exchange module of the present application;
FIG. 2 is a schematic view of a first configuration of the heat exchange device of the present application;
FIG. 3 is a schematic view of a second configuration of the heat exchange device of the present application;
FIG. 4 is a schematic view of a third construction of the heat exchange device of the present application;
FIG. 5 is a schematic diagram of a heat exchange process in which the heat exchange device of the present application is used as an evaporator;
fig. 6 is a schematic diagram of a heat exchange process of the heat exchange device as a condenser.
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and it will be apparent to those skilled in the art from this detailed description that the present application can be practiced. Features from different embodiments may be combined to yield new embodiments, or certain features may be substituted for certain embodiments to yield yet further preferred embodiments, without departing from the principles of the present application.
Referring to fig. 1 to 6, the present application provides a heat exchange apparatus, including a plurality of heat exchange modules, where each heat exchange module includes a first refrigerant inlet and outlet 100, a liquid separator 200, a microchannel heat exchanger 300, and a second refrigerant inlet and outlet 500 that are sequentially communicated, the second refrigerant inlet and outlet 500 is connected to the liquid separator 200, the microchannel heat exchanger 300 includes a first header 310, a refrigerant flow channel, and a second header 320 that are sequentially communicated, the first header 310 includes a first chamber 311 and a second chamber 312 that are connected to each other, the refrigerant flow channel includes a first refrigerant flow channel and a second refrigerant flow channel, the first chamber 311, the first refrigerant flow channel, and the second header 320 are sequentially communicated, the second chamber 312, and the second refrigerant flow channel, and the second header 320 are sequentially communicated, the first refrigerant flow channel is provided with a plurality of first heat exchange units, the second refrigerant flow channel is provided with a plurality of second heat exchange units, the liquid separator 200 is communicated to the first chamber 311, the liquid separator 200 is communicated to the second chamber 312, the second refrigerant flow channel 500 is communicated to the second chamber 312, and the second refrigerant inlet and outlet 500 are used as condenser heat exchange modules or evaporator modules.
The plurality of chambers are communicated with the first refrigerant inlet and outlet 100 and the second refrigerant inlet and outlet 500 by using pipelines, and a plurality of heat exchange units and the plurality of chambers form a plurality of heat exchange processes.
The operating state of the microchannel heat exchanger 300 is switched according to the difference of the refrigerant inflow ports. When the evaporator is used, a plurality of heat exchange processes are connected in parallel, so that the pressure loss of the refrigerant is reduced, and the heat exchange efficiency is improved; when the condenser is used, a plurality of heat exchange processes are connected in series, so that the flow velocity of the refrigerant is increased, and the heat exchange efficiency is improved.
Specifically, when the evaporator is used, the refrigerant absorbs heat and evaporates in the heat exchange unit. The refrigerant flows in from the first refrigerant inlet/outlet 100, passes through the liquid separator 200, and is divided into two paths, one of which directly flows into the second chamber 312, and flows into the second header 320 after absorbing heat and evaporating in the heat exchange unit, and the other of which flows into the first chamber 311, and flows into the second header 320 after absorbing heat and evaporating in the heat exchange unit. The merged refrigerant gas flows out from the second refrigerant inlet/outlet 500. When the evaporator is manufactured, the refrigerant is divided into two paths by the liquid distributor 200, and the two heat exchange processes are in parallel connection, so that the on-way pressure drop of the refrigerant can be effectively reduced, and the heat exchange efficiency is improved.
When the condenser is used, the refrigerant releases heat and condenses in the heat exchange unit. The refrigerant flows into the first chamber 311 from the second refrigerant inlet/outlet 500, and after heat dissipation and condensation in the heat exchange unit, the refrigerant flows into the second header 320, and after further heat dissipation and condensation in the heat exchange unit, the refrigerant flows out of the microchannel heat exchanger from the second chamber 312. When the condenser is used, the refrigerant is only one path, and the two heat exchange processes belong to a series connection relation, so that the flow velocity of the refrigerant can be improved, the heat exchange coefficient in the pipe is increased, and the heat exchange efficiency is improved.
Further, a first check valve 401 is disposed between the liquid separator 200 and the first chamber 311, a second check valve 402 is disposed between the second refrigerant inlet/outlet 500 and the first chamber 311, and a third check valve 403 is disposed between the second refrigerant inlet/outlet 500 and the second header 320.
When the evaporator is used, the refrigerant absorbs heat and evaporates in the heat exchange unit. The refrigerant flows in from the first refrigerant inlet/outlet 100, and after passing through the liquid separator 200, the refrigerant is divided into two paths, one path of the refrigerant directly flows into the second chamber 312, and flows into the second header 320 after absorbing heat and evaporating in the heat exchange unit, and the other path of the refrigerant flows into the first chamber 311 after passing through the first check valve 401, and flows into the second header 320 after absorbing heat and evaporating in the heat exchange unit. The merged refrigerant gas flows out from the second refrigerant inlet/outlet 500 through the third check valve 403. When the evaporator is manufactured, the refrigerant is divided into two paths by the liquid distributor 200, and the two heat exchange processes are in parallel connection, so that the on-way pressure drop of the refrigerant can be effectively reduced, and the heat exchange efficiency is improved.
When the condenser is used, the refrigerant releases heat and condenses in the heat exchange unit. The refrigerant flows in from the second refrigerant inlet/outlet 500, flows into the first chamber 311 through the second check valve 402, is subjected to heat dissipation and condensation in the heat exchange unit, flows into the second header 320, is subjected to further heat dissipation and condensation in the heat exchange unit, and flows out of the microchannel heat exchanger from the second chamber 312. When the condenser is used, the refrigerant is only one path, and the two heat exchange processes belong to a series connection relationship, so that the flow velocity of the refrigerant can be improved, the heat exchange coefficient in the pipe is increased, and the heat exchange efficiency is improved.
Further, the first chamber 311 is connected to the second chamber 312 through a partition, and the first chamber 311 and the second chamber 312 are independent from each other. The refrigerant distribution device is divided into a plurality of independent chambers through partition plates, and the refrigerant under different operation conditions is distributed through pipelines and valves connected with the chambers. The difference of the flow when the heat exchanger refrigerates and heats is realized.
Furthermore, the first heat exchange unit is a micro-channel flat tube, the second heat exchange unit is a micro-channel flat tube, and the adjacent micro-channel flat tubes are connected through fins. Are connected by N heat exchange units. The N heat exchange units and the plurality of independent chambers form N heat exchange processes. Wherein N > = N, N is a natural number greater than or equal to 2.
Further, the number of the first heat exchange units is different from the number of the second heat exchange units. Because the volume of the refrigerant is continuously reduced in the condensation process, each heat exchange flow path can be composed of different numbers of heat exchange units.
Further, the liquid separator 200 includes a first outlet pipe and a second outlet pipe, and when the heat exchange module is an evaporator, the diameter of the first outlet pipe is different from that of the second outlet pipe. Two outlet pipes with different diameters are used for distributing the flow of the refrigerant under different heat exchange processes. When the heat exchange device is used as an evaporator, the refrigerant can be reasonably distributed to a plurality of heat exchange processes after flowing through the liquid separator.
Furthermore, a plurality of heat exchange modules are stacked in series. The heat exchange device can be used for a single-row multi-flow heat exchange device, a heat exchange flows are added every time a heat exchange modules are added in series, and a is an even number which > = 2.
Further, as shown in fig. 2, a partition plate is arranged between the nth group of the second headers 320 and the (N-1) th group of the second headers, and a partition plate is arranged between the nth group of the second headers and the (N + 1) th group of the second headers; the Nth group of the first chambers 311 is in communication with the Nth-1 group of the second chambers 312; the nth set of the first one-way valves 401 is connected to the nth-1 set of the dispensers 200, and the nth set of the third one-way valves 402 is connected to the nth-1 set of the third one-way valves 402. The series superposition method can effectively reduce the difficulty of engineering matching, reduce the production cost and improve the reliability of equipment.
Further, as shown in fig. 3, the nth group of the second chambers 312 is in communication with the (N + 1) th group of the first chambers 311 through a Y-shaped tee. By doing so, the liquid distribution of the middle chamber is more uniform, and the heat exchange effect is enhanced.
Furthermore, a plurality of heat exchange modules are stacked in parallel. The heat exchange device can be used for a plurality of rows of heat exchange devices with less processes, a/2 superposition units are added when a heat exchange processes are added in parallel, and a is an even number of > = 2. A plurality of stacking bases are connected in parallel between the first refrigerant inlet/outlet 100 and the second refrigerant inlet/outlet 500. The parallel superposition method can effectively reduce the difficulty of engineering matching, reduce the production cost and improve the reliability of equipment.
Examples
Take a minimum unit micro-channel heat exchanger of 2 heat exchange processes as an example. The heat exchange process connected to the first chamber 311 is referred to as a first heat exchange process, and the heat exchange process connected to the second chamber 312 is referred to as a second heat exchange process. For example, the microchannel heat exchanger 300 comprises a total of 18 heat exchange units, wherein the first heat exchange process comprises 10 heat exchange units, and the second heat exchange process comprises 8 heat exchange units. In order to distribute the refrigerant flow in different heat exchange areas, the diameter of the connection between the liquid separator 200 and the second chamber 312 is smaller than the diameter of the connection between the liquid separator and the first chamber 311.
As shown in fig. 5, in the case of an evaporator, the refrigerant flows in from the first refrigerant inlet/outlet 100, passes through the liquid separator 200, and is divided into two paths, one of which directly flows into the second chamber 312 of the first header, and flows into the second header 320 after absorbing heat and evaporating in the second heat exchange process, and the other of which flows into the first chamber 311 of the first header after passing through the first check valve 401, and flows into the second header 320 after absorbing heat and evaporating in the first heat exchange process. The merged refrigerant gas flows out from the second refrigerant inlet/outlet 500 through the third check valve 403. When the evaporator is manufactured, the refrigerant is divided into two paths by the liquid distributor 200, and the 2 heat exchange processes are in parallel connection, so that the on-way pressure drop of the refrigerant can be effectively reduced, and the heat exchange efficiency is improved.
As shown in fig. 6, in the case of a condenser, the refrigerant flows in from the second refrigerant inlet/outlet 500, flows into the first chamber 311 of the header through the second check valve 402, is condensed by heat dissipation in the first heat exchange process, flows into the second header 320, is further condensed by heat dissipation in the second heat exchange process, and flows out of the microchannel heat exchanger from the second chamber 312 of the first header. When the condenser is used, the refrigerant is only one path, and the two heat exchange processes belong to a series connection relation, so that the flow velocity of the refrigerant can be improved, the heat exchange coefficient in the pipe is increased, and the heat exchange efficiency is improved.
Although the present application has been described above with reference to specific embodiments, those skilled in the art will recognize that many changes may be made in the configuration and details of the present application within the principles and scope of the present application. The scope of protection of the application is determined by the appended claims, and all changes that come within the meaning and range of equivalency of the technical features are intended to be embraced therein.
Claims (10)
1. A heat exchange device is characterized in that: the heat exchange system comprises a plurality of heat exchange modules, each heat exchange module comprises a first refrigerant inlet and outlet, a liquid distributor, a microchannel heat exchanger and a second refrigerant inlet and outlet which are sequentially communicated, each second refrigerant inlet and outlet is connected with the liquid distributor, each microchannel heat exchanger comprises a first collecting pipe, a refrigerant flow channel and a second collecting pipe which are sequentially communicated, each first collecting pipe comprises a first cavity and a second cavity which are mutually connected, each refrigerant flow channel comprises a first refrigerant flow channel and a second refrigerant flow channel, each first cavity and each first refrigerant flow channel are sequentially communicated with the corresponding second collecting pipe, each second cavity and each second refrigerant flow channel are sequentially communicated with the corresponding second collecting pipe, a plurality of first heat exchange units are arranged in each first refrigerant flow channel, a plurality of second heat exchange units are arranged in each second refrigerant flow channel, the liquid distributor is communicated with the corresponding first cavity, the liquid distributor is communicated with the corresponding second cavity, the second refrigerant inlet and outlet are communicated with the corresponding second cavity, and the heat exchange modules can be used as evaporators or condensers.
2. The heat exchange device of claim 1, wherein: a first check valve is arranged between the liquid separator and the first chamber, a second check valve is arranged between the second refrigerant inlet/outlet and the first chamber, and a third check valve is arranged between the second refrigerant inlet/outlet and the second header.
3. The heat exchange device of claim 2, wherein: the first chamber is connected with the second chamber through a partition plate, and the first chamber and the second chamber are arranged independently.
4. The heat exchange device of claim 3, wherein: the first heat exchange unit is a micro-channel flat tube, the second heat exchange unit is a micro-channel flat tube, and the adjacent micro-channel flat tubes are connected through fins.
5. The heat exchange device of claim 1, wherein: the number of the first heat exchange units is different from that of the second heat exchange units.
6. The heat exchange device of claim 5, wherein: the liquid distributor comprises a first outlet pipe and a second outlet pipe, and when the heat exchange module is an evaporator, the diameter of the first outlet pipe is different from that of the second outlet pipe.
7. The heat exchange device of any one of claims 2 to 6, wherein: and the heat exchange modules are stacked in series.
8. The heat exchange device of claim 7, wherein: a partition plate is arranged between the Nth group of second collecting pipes and the (N-1) th group of second collecting pipes, and a partition plate is arranged between the Nth group of first collecting pipes and the (N + 1) th group of first collecting pipes; the Nth group of the first chambers is communicated with the Nth-1 group of the second chambers; the Nth group of the first one-way valves is connected with the (N-1) th group of the liquid distributors, and the Nth group of the third one-way valves is connected with the (N-1) th group of the third one-way valves.
9. The heat exchange device of claim 8, wherein: the Nth group of the second chambers is communicated with the (N + 1) th group of the first chambers through a Y-shaped tee.
10. The heat exchange device of any one of claims 1 to 6, wherein: and a plurality of heat exchange modules are stacked in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211563228.2A CN115854596A (en) | 2022-12-07 | 2022-12-07 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211563228.2A CN115854596A (en) | 2022-12-07 | 2022-12-07 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115854596A true CN115854596A (en) | 2023-03-28 |
Family
ID=85670687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211563228.2A Pending CN115854596A (en) | 2022-12-07 | 2022-12-07 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115854596A (en) |
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2022
- 2022-12-07 CN CN202211563228.2A patent/CN115854596A/en active Pending
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